﻿/*
 * Copyright © 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Web.Mvc;
using Spring.Context;

namespace Spring.Web.Mvc;

/// <summary>
/// ActionInvoker implementation that enables the <see cref="IApplicationContext"/>to satisfy dependencies on ActionFilter attributes.
/// </summary>
public class SpringActionInvoker : ControllerActionInvoker
{
    private readonly IApplicationContext _context;

    /// <summary>
    /// Initializes a new instance of the <see cref="SpringActionInvoker"/> class.
    /// </summary>
    /// <param name="context">The IApplicationContext.</param>
    public SpringActionInvoker(IApplicationContext context)
    {
        _context = context;
    }

    /// <summary>
    /// Retrieves information about the action filters.
    /// </summary>
    /// <param name="controllerContext">The controller context.</param>
    /// <param name="actionDescriptor">The action descriptor.</param>
    /// <returns>Information about the action filters.</returns>
    protected override FilterInfo GetFilters(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
    {
        //let the base class do the actual work as usual
        var filterInfo = base.GetFilters(controllerContext, actionDescriptor);

        //configure each collection of filters using the IApplicationContext
        foreach (IActionFilter filter in filterInfo.ActionFilters.Where(f => f != null))
        {
            _context.ConfigureObject(filter, filter.GetType().FullName);
        }

        foreach (IAuthorizationFilter filter in filterInfo.AuthorizationFilters.Where(f => f != null))
        {
            _context.ConfigureObject(filter, filter.GetType().FullName);
        }

        foreach (IExceptionFilter filter in filterInfo.ExceptionFilters.Where(f => f != null))
        {
            _context.ConfigureObject(filter, filter.GetType().FullName);
        }

        foreach (IResultFilter filter in filterInfo.ResultFilters.Where(f => f != null))
        {
            _context.ConfigureObject(filter, filter.GetType().FullName);
        }

        return filterInfo;
    }
}